/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserVirtualPathTree.h
Adds the specified path to the tree, creating nodes as needed and calling OnPathAdded for any new paths added. Returns true if the specified path was actually added (as opposed to already existed)
bool CachePath ( [FName](API\Runtime\Core\UObject\FName) Path, [FName](API\Runtime\Core\UObject\FName) InternalPath, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void([FName](API\Runtime\Core\UObject\FName))> OnPathAdded )